Initial commit: hardened DeerFlow factory
Vendored deer-flow upstream (bytedance/deer-flow) plus prompt-injection hardening: - New deerflow.security package: content_delimiter, html_cleaner, sanitizer (8 layers — invisible chars, control chars, symbols, NFC, PUA, tag chars, horizontal whitespace collapse with newline/tab preservation, length cap) - New deerflow.community.searx package: web_search, web_fetch, image_search backed by a private SearX instance, every external string sanitized and wrapped in <<<EXTERNAL_UNTRUSTED_CONTENT>>> delimiters - All native community web providers (ddg_search, tavily, exa, firecrawl, jina_ai, infoquest, image_search) replaced with hard-fail stubs that raise NativeWebToolDisabledError at import time, so a misconfigured tool.use path fails loud rather than silently falling back to unsanitized output - Native client back-doors (jina_client.py, infoquest_client.py) stubbed too - Native-tool tests quarantined under tests/_disabled_native/ (collect_ignore_glob via local conftest.py) - Sanitizer Layer 7 fix: only collapse horizontal whitespace, preserve newlines and tabs so list/table structure survives - Hardened runtime config.yaml references only the searx-backed tools - Factory overlay (backend/) kept in sync with deer-flow tree as a reference / source See HARDENING.md for the full audit trail and verification steps.
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# generate_area_chart — 面积图
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## 功能概述
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展示连续自变量(常为时间)下的数值趋势,可启用堆叠观察不同分组的累计贡献,适合 KPI、能源、产出等时间序列场景。
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## 输入字段
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### 必填
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- `data`: 数组,元素包含 `time`(string)与 `value`(number),堆叠时需补充 `group`(string),至少 1 条记录。
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### 可选
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- `stack`: boolean,默认 `false`,开启堆叠需确保每条数据都含 `group` 字段。
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- `style.backgroundColor`: string,设置图表背景色(如 `#fff`)。
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- `style.lineWidth`: number,自定义面积边界的线宽。
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- `style.palette`: string[],传入调色板数组用于系列着色。
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- `style.texture`: string,默认 `default`,可选 `default`/`rough` 以控制手绘质感。
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- `theme`: string,默认 `default`,可选 `default`/`academy`/`dark`。
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- `width`: number,默认 `600`,控制图表宽度。
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- `height`: number,默认 `400`,控制图表高度。
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- `title`: string,默认空字符串,用于设置图表标题。
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- `axisXTitle`: string,默认空字符串,用于设置 X 轴标题。
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- `axisYTitle`: string,默认空字符串,用于设置 Y 轴标题。
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## 使用建议
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保证 `time` 字段格式统一(如 `YYYY-MM`);堆叠模式下各组数据需覆盖相同的时间点,可先做缺失补值。
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## 返回结果
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- 返回图像 URL,并在 `_meta.spec` 中附带完整面积图配置,可供二次渲染或追踪。
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